STARLINK-35549, 66139
Orbit data source: Space-Track
STARLINK-35549, 66139 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Wed, 22 Oct 2025 UTC via an FALCON 9 launch vehicle from the Air Force Western Test Range (AFWTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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66139 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
SpaceX/Seattle
Mission
Operational Commercial Communications
Bus & Motor
STARLINK V2MO, Unknown motor
Mass
575 kg wet, ~530 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 17.7 m
Radar Cross Section
36.964 m²
Expand to show TLE details & historyLast TLE update: 20 hours ago
TLE from 20 hours ago
0 STARLINK-35549
1 66139U 25237AB 26061.30901396 .00020214 00000-0 69288-3 0 9995
2 66139 53.1594 73.6802 0001153 89.1632 270.9501 15.30193940 21483Epoch: 2026-03-02T07:24Z
TLE epoch observation values (Epoch: 2026-03-02T07:24:58.806Z)
Latitude
0.00001°
Longitude
162.3309°
Altitude
476.12 km
Speed
7.629 km/s
True Right ascension
04h 54m 43s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
07:14:36
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
476.28 km
Perigee altitude
474.699 km
Semi-major axis
6,853.627 km
Eccentricity
0.00012
Inclination
53.1594°
RAAN
73.6802°
Arg. of periapsis
89.1632°
True anomaly
270.93689°
Mean anomaly
270.9501°
Eccentric anomaly
270.94349°
Mean motion
3.82527 °/min
Orbital period
94.11 mins
BSTAR
0.00069288
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Other satellites on launch #237 in the year 2025 (2025-10-22 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.STARLINK-35549 Visibility forecast
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Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2026-03-03 03:59:21.540Z | 250.334° W | 2026-03-03 04:02:21.540Z | 299.762° NW | 34.416° | 2026-03-03 04:06:21.540Z | 40.142° NE |
| 4 mins | 2026-03-03 08:58:21.540Z | 354.115° N | 2026-03-03 08:59:21.540Z | 17.458° NNE | 21.739° | 2026-03-03 09:02:21.540Z | 78.903° E |
| 6 mins | 2026-03-03 10:35:21.540Z | 296.215° NW | 2026-03-03 10:37:21.540Z | 253.958° W | 37.062° | 2026-03-03 10:41:21.540Z | 147.187° SSE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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